I have the Invisible Shield on mine and I love it! It works great! You're call really though. I like the Invisible Shield because it has a clean feel to it and my fingers glide across the iPad's screen not getting caught as if it was sticky... It's great in my opinion!

I heard good things about the SGP AF screen protector (and I have a similar anti-glare screen protector on my phone), so I'm going to use that when my iPad arrives in a week or two. I've heard that both the invisible shield and bodyguardz skins add a slight "stickiness" to the screen, which I would never want.